On a previous page of this massive document, you had to find the surface area of a 3D shape using its net.  On Q41-Q43, you have to find the surface area using a formula.  Luckily the formula in question is easily understood by looking at the net for the solid.  Also, recall that the essential difference between the lateral and the total surface area is the exclusion or inclusion of the base areas.  Duration: 14:05

Without a calculator, can you approximate a square root that is not a whole number?  In other words, can you find the two whole numbers an irrational square root lies between?  If you cannot, this video should give you some tips.  Duration: 3:31

Scientific notation allows us to easily write numbers that are either really small or obnoxiously large.  However, there are a few rules that must be followed when converting number into or out of this numerical shorthand, and this video will give you an overview of those rules.  Duration: 7:01

When you first learned to solve linear equations, they weren't mixed up with systems of equations or quadratic equations.  You didn't have to first identify the equation as linear before solving it, since that was essentially done for you.  As you will see, identifying the type of equation leads you down the correct path to solving that equation, so in this video, we will see exactly what makes an equation linear.  Duration: 12:26